N 1 2x

N 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2x
N 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2x
N 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2xN 1 2x